# US 10,501,171 B2 · Rotorcraft and heat dissipation structure for motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,171 B2 - Document ID: US10501171B2 - Status: Granted - Kind: B2 - Application number: 15/484,395 - Filed: 2017-04-11 - Published: 2017-08-03 - Granted: 2019-12-10 - Earliest claimed: 2014-10-27 - Assignees: Guangzhou Xaircraft Technology Co., Ltd. - Applicants: Guangzhou Xaircraft Technology Co., Ltd. - Inventors: Bin Peng; Dingfeng Xiao - Web page: https://patentgrep.com/patent/US10501171B2 ## CPC - B64U 50/19: using electrically powered motors - B64C 25/08: non-fixed, e.g. jettisonable - B64C 25/52: Skis or runners - B64C 25/58: Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C25/50) - B64D 27/402: {comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant} - B64D 33/08: of power plant cooling systems - B64U 20/94: of rotors or rotor motors - H02K 9/06: with fans or impellers driven by the machine shaft - B64C 2025/325: {specially adapted for helicopters} - B64U 10/14: with four distinct rotor axes, e.g. quadcopters - B64U: UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR - B64C: AEROPLANES; HELICOPTERS - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A rotorcraft together with a heat dissipation structure for a motor are provided. The motor includes a body and a revolving shaft driven by the body, and the heat dissipation structure for the motor includes: a casing being a hollow structure having a top opening and an air inlet in a bottom portion, in which the body is disposed inside of the casing, and an air channel is formed between a circumferential edge of the body and an inner wall of the casing; a head cover connected to the revolving shaft of the motor synchronously and provided with a plurality of air flow picks on the lower surface thereof; and a mounting stand fixed to an upper surface of the head cover. ## Claims ### Claim 1 A heat dissipation structure for a motor, the motor comprising a body and a revolving shaft driven by the body, wherein the heat dissipation structure comprises: a casing being a hollow structure having a top opening and an air inlet in a bottom portion, wherein the casing is configured to receive the body, and an air channel is formed between a circumferential edge of the body and an inner wall of the casing; a head cover connected to the revolving shaft synchronously and covering the top opening, wherein the head cover is driven to rotate by the motor, a first gap communicating the air channel with an outside is defined by a lower surface of the head cover and a top end face of the casing, and the lower surface of the head cover is provided with a plurality of air flow picks; and a mounting stand fixed to an upper surface of the head cover, covering an axial end of the revolving shaft, and configured to be connected with a propeller. ### Claim 2 (depends on 1) The heat dissipation structure according to claim 1, wherein the plurality of air flow picks is arranged in a circumferential array around a central axis of the head cover, and an extension direction of each air flow pick is coincident with a radial direction of the head cover. ### Claim 3 (depends on 2) The heat dissipation structure according to claim 2, wherein the top opening is formed with an upper end, which is open, of the casing. ### Claim 4 (depends on 2) The heat dissipation structure according to claim 2, wherein the top opening is formed with a top portion, which is open, of the air channel in the casing. ### Claim 5 (depends on 2) The heat dissipation structure according to claim 2, wherein the body is detachably mounted with respect to the casing. ### Claim 6 (depends on 1) The heat dissipation structure according to claim 1, wherein a second gap exists between an inner end of each air flow pick and a center of the head cover. ### Claim 7 (depends on 6) The heat dissipation structure according to claim 6, wherein the body is detachably mounted with respect to the casing. ### Claim 8 (depends on 1) The heat dissipation structure according to claim 1, wherein the plurality of air flow picks is arranged to be spiral in shape. ### Claim 9 (depends on 1) The heat dissipation structure according to claim 1, wherein each air flow pick is triangular in shape, and a distance between a top end surface and a bottom end surface of each air flow pick decreases from one end to another end. ### Claim 10 (depends on 1) The heat dissipation structure according to claim 1, wherein the upper surface of the head cover is provided with a water guiding surface, and the water guiding surface has a height reducing from a center of the water guiding surface to an edge of the water guiding surface. ### Claim 11 (depends on 1) The heat dissipation structure according to claim 1, wherein an edge of the head cover is located outside of a top edge of the casing. ### Claim 12 (depends on 1) The heat dissipation structure according to claim 1, wherein the revolving shaft is provided with a support, and the head cover and the mounting stand are fixed to the support. ### Claim 13 (depends on 1) The heat dissipation structure according to claim 1, wherein the air inlet is configured to be a hole arranged in a bottom portion of a side wall of the casing. ### Claim 14 (depends on 13) The heat dissipation structure according to claim 13, wherein a plurality of holes is arranged in the bottom portion of the side wall of the casing. ### Claim 15 (depends on 1) The heat dissipation structure according to claim 1, wherein the top opening is formed with an upper end, which is open, of the casing. ### Claim 16 (depends on 1) The heat dissipation structure according to claim 1, wherein the top opening is formed with a top portion, which is open, of the air channel in the casing. ### Claim 17 (depends on 1) The heat dissipation structure according to claim 1, wherein the body is detachably mounted with respect to the casing. ### Claim 18 (depends on 1) The heat dissipation structure according to claim 1, wherein each air flow picks is triangular in shape, and a distance between a top end surface and a bottom end surface of each air flow picks decreases from a radially inner end to a radially outer end, and the upper surface of the head cover has a height reducing radially outwards from a center of the upper surface to an edge of the upper surface, to function as a water guiding surface. ### Claim 19 A rotorcraft comprising: a motor comprising a body and a revolving shaft driven by the body; and a heat dissipation structure for the motor, wherein the heat dissipation structure comprises: a casing being a hollow structure having a top opening and an air inlet in a bottom portion, wherein the body is disposed inside of the casing, and an air channel is formed between a circumferential edge of the body and an inner wall of the casing; a head cover connected to the revolving shaft synchronously and covering the top opening in the casing, wherein the head cover is driven to rotate by the motor, a first gap communicating the air channel and an outside is defined by a lower surface of the head cover and a top end face of the casing, and the lower surface of the head cover is provided with a plurality of air flow pick; and a mounting stand fixed to an upper surface of the head cover and covering an axial end of the revolving shaft. ### Claim 20 (depends on 19) The rotorcraft according to claim 19 further comprises: an airframe; an arm having a first end connected to the airframe; wherein the casing of heat dissipation structure is disposed to the second end of the arm, and the propeller is connected to a second end of the arm and driven to rotate by the motor.